I'd like some advice to pass on to my Sister. She has 5 children, 4 boys, 1 girl. The 4 boys have ADHD/ODD and one has an anger issue. Now her 14 (almost 15) year old is literally out of control. He's been statemented and goes to a special school for children with behavioural issues. It's got to the point where he's punched his Dad in the face when he tried to stop him fighting with his siblings. He's smashed the house up, broken windows at school, he's stolen from his parents, he smokes, he hits the other children. She's even had to call the police on him. Her youngest, who's 11, went to school crying because he'd broken his tablet computer(along with the other childs and his own tablet) and he didn't want to go home because he knew he'd kick off again as he does everyday. He has quite literally broken everything including her dining table and 6 chairs, a bench and there are holes everywhere where he punches them. She's taken him to an anger management specialist and he just laughed all the way through and shrugged. This is the short version. Her eldest, which is her daughter, is now 16 and she's at her wits end too. They're all just miserable and helpless. She's had special workers and all the rest of it, as well as meds and goodness knows what else but nobody knows what to do. She's always wearing her coat in the house and was so hot and when questioned she said she has to put her purse etc in there and keep it on because he WILL steal anything and everything off her. She came to me crying because she's considering putting him into care but all she was told was if she called up social services and said she couldn't cope that they'd just take him for a day or 2 and then send him home again. She has 4 other children to think about here, one whom keeps staying at his friends house because he's worried he'll be murdered in his sleep by his brother! 
She doesn't know how to go about this or even where to turn and feels like such a bad mother because she doesn't know how to stop all this and it's hurting her other children. She doesn't want him blaming her and hating her but even when she told him seriously and calmly that he would have to go into care, he said he wasn't really bothered. Any advice would be much appreciated, thank you!